Next up was ABC (7.46 million viewers, #3; adults 18-49: 2.2, #3) with a special "20/20" (8.04 million viewers, #7; adults 18-49: 1.5, #13) followed by a new "Private Practice" (7.19 million viewers, #8; adults 18-49: 2.5, #T8) and a second hour of "Private Practice" (7.15 million viewers, #9; adults 18-49: 2.6, #T6).

In Nielsen's 56 metered markets, household results were: "The Tonight Show with Jay Leno," 2.6/7; CBS's "Late Show with David Letterman," 3.2/8; and ABC's combo of "Nightline," 3.2/8; and "Jimmy Kimmel Live," 1.5/5.

In the 25 markets with Local People Meters, adult 18-49 results were: "The Tonight Show with Jay Leno," 0.8/4; "Late Show," 0.7/3; "Nightline," 1.1/5; and "Jimmy Kimmel Live," 0.6/3.

At 12:35 a.m., "Late Night with Jimmy Fallon" (1.4/5 in metered-market households) trailed CBS's "Late Late Show with Craig Ferguson" (1.5/5). In the 25 markets with Local People Meters, "Late Night" (0.5/3 in 18-49) topped "Late Late Show" (0.4/2).

At 1:35 a.m., "Last Call with Carson Daly" averaged a 0.8/4 in metered-market households with an encore and a 0.3/3 in adults 18-49 in the 25 markets with local people meters.

Here are the highlights of the 16 ad-sustained programs that aired in primetime on the broadcast networks one year ago (11/18/10):